US6546878B1 - Multi-unit railroad freight car for carrying cargo containers - Google Patents
Multi-unit railroad freight car for carrying cargo containers Download PDFInfo
- Publication number
- US6546878B1 US6546878B1 US09/976,690 US97669001A US6546878B1 US 6546878 B1 US6546878 B1 US 6546878B1 US 97669001 A US97669001 A US 97669001A US 6546878 B1 US6546878 B1 US 6546878B1
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- United States
- Prior art keywords
- container
- unit
- sill
- freight car
- bridge unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D3/00—Wagons or vans
- B61D3/16—Wagons or vans adapted for carrying special loads
- B61D3/20—Wagons or vans adapted for carrying special loads for forwarding containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D3/00—Wagons or vans
- B61D3/16—Wagons or vans adapted for carrying special loads
- B61D3/18—Wagons or vans adapted for carrying special loads for vehicles
- B61D3/187—Details, e.g. bridges for floor connections
Definitions
- the present invention relates to multi-unit railroad freight cars, and in particular to such a car including container well units.
- Freight cars including multiple well units for carrying stacked intermodal cargo containers are well known. Some of these cars use shared trucks to support adjacent well units. Others use drawbars to interconnect adjacent units that are each fully supported by their own trucks. In both of these types of multi-unit container well cars the large space between the ends of containers carried in adjacent well units results in a significant amount of aerodynamic drag during train operation and leaves a significant portion of the length of a train in which no cargo containers are present.
- containers of nominal 20-foot length are limited to 52,900 pounds
- nominal 40-foot containers are limited to 67,200 pounds
- nominal 53-foot containers may be designed for either 56,700 pounds or 67,200 pounds.
- Utilization of shared trucks to support adjacent well units for carrying stacked containers in such multi-unit railroad freight cars can reduce the portion of the length of car in which there are no containers, but it also requires restricting the weight or number of containers which can be carried stacked in each of those adjacent well units carried by a single shared truck, in order to avoid overloading the shared truck. This often results in the unshared truck at each end of such a multi-unit well car being significantly under-loaded. As a result, such multi-unit well cars with shared trucks are often loaded to less than the optimum ratio of load weight to the length of a train of such cars.
- a container-carrying multi-unit railroad freight car that has improved aerodynamic characteristics when loaded, that can be loaded to utilize more fully the available carrying capacity of the trucks with which such a multi-unit car is equipped, and in which the cargo weight for such a multi-unit car of a given length and container well size is maximized.
- the present invention overcomes some of the aforementioned drawbacks and provides an answer to some of the shortcomings of the prior art railroad cars mentioned above by providing a multi-unit railroad freight car for carrying containers, in which at least two coupled container well units each include a container well and have respective body end structures, and in which a container-supporting bridge unit is located between the two container well units and has a pair of opposite ends each supported on the body of a respective one of the two adjacent container well units.
- a container support structure included in the bridge unit extends above the body bolster structure of the end of the adjacent container well unit.
- the multi-unit freight car has a container-supporting bridge unit that includes an elongate center sill including opposite sill ends and has a center bearing associated with each of the opposite sill ends.
- One aspect of the invention is the provision of a multi-unit railroad freight car that includes a bridge unit having a pair of transverse bolsters each attached to a center sill, and in which at least one of the transverse bolsters has a side bearing support leg aligned with a corresponding side bearing located on the body of an adjacent container well unit.
- a container-supporting bridge unit for a multi-unit railroad freight car includes a pair of opposite ends and a pair of container support arms associated with each of its opposite ends, and each of the opposite ends is supported by body end structure, such as a body bolster, of the adjacent container well unit of a multi-unit car including such a bridge unit.
- FIG. 1 is a side elevational view of a multi-unit railroad freight car which includes one preferred embodiment of the invention.
- FIG. 2 is a top plan view of a portion of the multi-unit railroad freight car shown in FIG. 1 .
- FIG. 3 is a side elevational view of the portion of a multi-unit railroad freight car shown in FIG. 2, including the container-supporting bridge unit together with portions of adjacent container well units and their trucks.
- FIG. 4 is a bottom plan view of the container-supporting bridge unit structure shown in FIG. 2 .
- FIG. 5 is an end elevational view of the container-supporting bridge unit shown in FIGS. 3 and 4, in an upright orientation.
- FIG. 6 is a sectional view taken along line 6 — 6 of FIG. 1 .
- FIG. 7 is a top plan detail view of a portion of a body bolster of a well unit supporting one end of a container-supporting bridge unit, including the bowl or lower part of the center bearing and the side bearings supporting the container-supporting bridge unit.
- FIG. 8 is a top plan detail view of a portion of a body bolster of a well unit supporting the other end of a container-supporting bridge unit, including the oblong bowl or lower part of the center bearing and the side bearings supporting the container-supporting bridge unit.
- FIG. 9 is a sectional view taken on line 9 — 9 of FIG. 8 .
- FIG. 1 a multi-unit railroad freight car 14 embodying the present invention is shown in FIG. 1 .
- the freight car 14 includes five car units, of which a first container well unit 16 is at one end, a second container well unit 18 is at the opposite end, and a third container well unit 20 is in the middle of the 5-unit car.
- the container well units 16 , 18 and 20 are coupled with one another by conventional drawbars 17 and 19 .
- Two shorter container-supporting bridge units 22 and 24 similar to each other, are located between the container well units.
- a respective truck 28 for example, a 70-ton truck, is located at each end of the car 14 , supporting the outer ends of the two end well units 16 and 18 .
- Larger capacity trucks 30 and 32 for example, 100-ton trucks, support the rest of the multi-unit car.
- the drawbars 17 and 19 coupling the container well units 16 , 18 and 20 with each other result in a truck center separation distance 33 of about 131 ⁇ 2 feet in the multi-unit car 14 .
- each well unit 16 , 18 , or 20 may, for example, be generally similar to the well car units disclosed in Hill et al. U.S. Pat. No. 4,893,567, and may be capable of carrying a pair of 20-foot intermodal cargo containers 34 , a pair of 24-foot containers (not shown), a single 40-foot container, a 53-foot container 36 , or a container of an intermediate length (not shown) in its well 38 .
- a 53-foot container 36 or a shorter container may be stacked as an upper tier on top of the container 36 or containers 34 carried in the well 38 .
- Each of the container-supporting bridge units 22 and 24 extends between two adjacent ones of the well units 16 , 18 , and 20 , and each end of each bridge unit 22 or 24 is supported by a respective body bolster 40 or 42 of an adjacent one of the container well units 16 , 18 and 20 .
- the body end structures of the well units 16 and 20 include stub sills 39 extending outward from the body bolsters 40 and 42 , and structures 41 extending from the end of each well 38 to the body bolster 40 or 42 .
- the structures 41 may include portions of side sills and well end bulkheads and the like, extending above and around the truck 30 or 32 . Appropriate walkways are also present.
- each of the bridge units 22 and 24 supports an intermodal cargo container 44 at a location higher than that of each of the containers 34 or 36 held within the well 38 of one of the well units 16 , 18 or 20 .
- the container 44 is carried on the bridge unit 22 or 24 so that each end 43 or 45 of the container 44 extends above the respective body bolster 40 or 42 of the adjacent well unit 16 , 18 or 20 toward the respective container well 38 .
- the container 44 as shown in the multi-unit car 14 , is a nominal 20-foot container, but the bridge units 22 and 24 could be constructed in such a car to carry containers of other lengths instead, if desired, consistent with the lengths of the drawbars 17 and 19 .
- Each container-supporting bridge unit 22 and 24 includes longitudinal and transverse structural members for supporting cargo loads, but is not intended to carry significant draft or buff loads due to train operation beyond those resulting from its own mass or a container 44 carried on it.
- a center bearing is provided at each end of each container-supporting bridge unit 22 or 24 to connect the bridge unit 22 or 24 to the bodies of the adjacent well units 16 , 18 or 20 .
- Each bridge unit retains and supports a container 44 above a structure such as a body bolster at an end of the body of an adjacent container well unit.
- each of the container-carrying bridge units 22 and 24 is a welded structure of steel plates in the form of box-section beams, although other equivalent structural arrangements might be utilized instead.
- the bridge unit 22 will be described herein in detail, together with the adjacent well units 16 and 20 , and it will be understood that the bridge unit 24 is of similar construction and is similarly related to the adjacent well units 20 and 18 .
- the container-supporting bridge unit 22 has a longitudinally extending horizontal center sill 46 equipped at each of its ends 48 and 50 with an upper portion or plate 52 of a center bearing.
- a lower, or bowl, member 54 of a center bearing is mounted on the top of the body bolster 42 of the adjacent well unit 20 , as shown best in FIGS. 2 and 3.
- a similar upper portion or plate 52 rests in an oblong lower, or bowl, member 56 mounted on the top of the body bolster 40 of the other adjacent well unit 16 .
- the center bearing plates 52 are held together with the lower parts or bowls 54 and 56 by locking pins 58 including suitable keys 60 engaged with the shafts of the locking pins 58 .
- Suitable side bearings 68 are mounted atop the body bolster 42 of the container well unit 20 on both lateral sides of the center bearing bowl 54 to receive off-center loads from the container-supporting bridge unit 22 through the side bearing support legs 66 .
- Side bearings 70 are similarly mounted atop the body bolster 40 of the well unit 16 on both lateral sides of the oblong center bearing bowl 56 .
- the container-supporting bridge unit 22 is free to move longitudinally a limited distance with respect to the oblong center bearing lower bowl 56 , and the respective pin 58 is similarly able to move in the slot 71 .
- the side bearings 70 on the body bolster 40 are of greater length than the side bearings 68 .
- the side bearings 68 and 70 may be conventional roller side bearings with a small gap to accommodate normal side-to-side rail height variations yet control lateral rocking of the intermediate unit 22 with respect to the adjacent container well units 16 and 20 . Since the body of each container well unit 16 , 18 and 20 also has side bearings to limit its movement with respect to each truck 30 or 32 , this side bearing arrangement of the container-supporting bridge unit 22 also limits the ability of the bridge unit 22 to roll laterally with respect to the truck 30 or 32 of the adjacent well unit 16 or 20 .
- each of the transverse bolsters 62 and 64 Extending horizontally and diagonally outward from each of the transverse bolsters 62 and 64 are pairs of container support arms 72 whose outer ends 74 are separated by the width of a standard cargo container such as the container 44 .
- the container support arms 72 like the transverse bolsters 62 and 64 , are shallower than the center sill 46 , and are tapered from a greatest width at the transverse bolsters.
- the container support arms 72 extend beyond the body bolsters 40 and 42 toward the container wells 38 .
- the extreme ends 43 and 45 are located above portions of the body end structures 41 of the container well units 16 and 20 , between the end of each well 38 and the respective body bolster 40 or 42 . This leaves a distance 75 , between each end 43 or 45 of the container 44 and the adjacent container well 38 , of about 1 to 4 feet, and preferably about 2 feet, depending on the design of the container well units 16 and 20 .
- Respective twist-lock container-fastening hold-down devices 78 are mounted on the outer ends 74 of the container support arms 72 at locations corresponding with those of the standard placement of container structures defining lifting and stacking apertures to retain and provide direct support for a cargo container 44 carried by the container-supporting bridge unit 22 .
- the previously mentioned locking pins 58 keep the bridge unit 22 attached to the respective container well unit body bolsters 40 and 42 to overcome the hold-down devices 78 when a container 44 is lifted from the bridge unit.
- the container-supporting bridge unit 22 By supporting the container 44 atop the container support arms 72 extending above the body bolsters 40 and 42 of the adjacent well units 20 and 16 , the container-supporting bridge unit 22 disclosed herein places the ends 43 and 45 of the container 44 closer longitudinally to a container 34 or 36 or stacked containers carried in the adjacent well units 16 and 20 than is possible in conventional multi-unit container-carrying well cars.
- the length of the gap 76 between longitudinally adjacent containers may thereby be made as small as about 1 to 4 feet, and preferably about 2 feet, while still leaving adequate room to allow the car 14 to negotiate curved track, and a smaller aerodynamic drag is produced, accordingly, than by containers carried on adjacent container-carrying well car units interconnected with each other by either a drawbar or a shared truck in conventional multi-unit freight cars.
- the multi-unit freight car 14 may be constructed as shown with a length 80 of about 229 feet over coupler pulling faces and with a cargo capacity of 593,300 pounds in a load consisting of eight 20-foot containers and three 53-foot containers. This results in a cargo capacity of about 2,590 pounds of cargo for each foot of car length, which is significantly greater than for a previously available freight car with container wells of similar length in drawbar-coupled well units alone.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
- Stackable Containers (AREA)
- Handcart (AREA)
Abstract
Description
Claims (22)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US09/976,690 US6546878B1 (en) | 2001-10-12 | 2001-10-12 | Multi-unit railroad freight car for carrying cargo containers |
CA002360174A CA2360174C (en) | 2001-10-12 | 2001-10-24 | Multi-unit railroad freight car for carrying cargo containers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/976,690 US6546878B1 (en) | 2001-10-12 | 2001-10-12 | Multi-unit railroad freight car for carrying cargo containers |
Publications (2)
Publication Number | Publication Date |
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US6546878B1 true US6546878B1 (en) | 2003-04-15 |
US20030070577A1 US20030070577A1 (en) | 2003-04-17 |
Family
ID=25524355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/976,690 Expired - Fee Related US6546878B1 (en) | 2001-10-12 | 2001-10-12 | Multi-unit railroad freight car for carrying cargo containers |
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US (1) | US6546878B1 (en) |
CA (1) | CA2360174C (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
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US20090120324A1 (en) * | 2007-11-14 | 2009-05-14 | Gunderson Llc | Container car side sills |
US7608934B1 (en) | 2008-08-14 | 2009-10-27 | F3 & I2, Llc | Power packaging with railcars |
US20100060093A1 (en) * | 2008-08-14 | 2010-03-11 | F3 & I2, Llc | Power packaging with railcars |
US7757610B2 (en) | 2008-07-30 | 2010-07-20 | Gunderson Llc | Shortened container well |
US20110226153A1 (en) * | 2010-03-17 | 2011-09-22 | Gunderson Llc | Railcar with lengthened container well |
US20110315040A1 (en) * | 2005-08-16 | 2011-12-29 | Bombardier Transportation Gmbh | Vehicle with Anti-Roll Devices |
US8096739B1 (en) | 2009-04-08 | 2012-01-17 | Bnsf Railway Company | Method and apparatus for transporting wind turbine blades |
US20120090501A1 (en) * | 2010-10-15 | 2012-04-19 | Kelly Thomas P | System and apparatus for multi-modal transportation |
US8177461B2 (en) | 2010-04-09 | 2012-05-15 | Gunderson Llc | Transport and storage of wheelsets |
US8342786B2 (en) | 2010-10-18 | 2013-01-01 | Bnsf Railway Company | Container auto-lock system |
US8500378B1 (en) * | 2009-08-11 | 2013-08-06 | Transportation Technology Services, Inc | Large tower railroad transportation system and method |
US9434291B2 (en) | 2010-10-15 | 2016-09-06 | Bnsf Railway Company | Method and apparatus for transporting wind turbine blades |
US9527427B2 (en) | 2010-10-18 | 2016-12-27 | Bnsf Railway Company | Container auto-lock system |
WO2017092541A1 (en) * | 2015-12-02 | 2017-06-08 | 南车长江车辆有限公司 | Carrying connection device for road-rail combined transport vehicle |
US10232862B2 (en) | 2016-01-26 | 2019-03-19 | Bnsf Logistics, Llc | Saddle system for use in the rail transport of large towers |
US10384592B1 (en) * | 2016-08-04 | 2019-08-20 | Peck & Hale, L.L.C. | Automatic lock for cargo container |
US10562548B2 (en) | 2017-08-16 | 2020-02-18 | Gunderson Llc | Attachment of articulated connectors in multi-unit freight cars |
US10780899B1 (en) | 2019-05-23 | 2020-09-22 | Charles C. Yang | Foldable aerodynamic drag reducing plate assembly for a domestic or intermodal container |
US10794410B1 (en) | 2019-05-23 | 2020-10-06 | Charles C. Yang | Foldable aerodynamic drag reducing plate assembly for an intermodal container |
US11465657B2 (en) * | 2017-12-12 | 2022-10-11 | Trinity North American Freight Car, Inc. | Twenty-foot double stack well car |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8511236B2 (en) * | 2009-02-27 | 2013-08-20 | Union Pacific Railroad Company | Aerodynamic pseudocontainers for reducing drag associated with stacked intermodal containers |
US8215239B2 (en) * | 2009-02-27 | 2012-07-10 | Union Pacific Railroad Company | Aerodynamic pseudocontainer for reducing drag associated with stacked intermodal containers |
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- 2001-10-24 CA CA002360174A patent/CA2360174C/en not_active Expired - Fee Related
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Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110315040A1 (en) * | 2005-08-16 | 2011-12-29 | Bombardier Transportation Gmbh | Vehicle with Anti-Roll Devices |
US20090120324A1 (en) * | 2007-11-14 | 2009-05-14 | Gunderson Llc | Container car side sills |
US7757610B2 (en) | 2008-07-30 | 2010-07-20 | Gunderson Llc | Shortened container well |
US8294285B2 (en) | 2008-08-14 | 2012-10-23 | F3 & I2, Llc | Power packaging with railcars |
US7608934B1 (en) | 2008-08-14 | 2009-10-27 | F3 & I2, Llc | Power packaging with railcars |
US20100060093A1 (en) * | 2008-08-14 | 2010-03-11 | F3 & I2, Llc | Power packaging with railcars |
US8096739B1 (en) | 2009-04-08 | 2012-01-17 | Bnsf Railway Company | Method and apparatus for transporting wind turbine blades |
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US8192117B1 (en) | 2009-04-08 | 2012-06-05 | Bnsf Railway Company | Method and apparatus for transporting wind turbine blades |
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Also Published As
Publication number | Publication date |
---|---|
US20030070577A1 (en) | 2003-04-17 |
CA2360174A1 (en) | 2003-04-12 |
CA2360174C (en) | 2005-07-26 |
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